On Mon, 23 May 2016 22:06:31 GMT, "buckwheat" wrote:

Have a small project I'm working on and need some advise. Pouring a small
concrete slab that I have formed on two sides, the side buts up to an
existing slab and the back is concrete blocks. I am in zone 5, do I need
expansion joints? if so what is best?

If what you want is "advice" I recommend you ask a building inspector... that's their job.